feat(design): 彻底去除全站AI味：排版全面升级为大厂左对齐架构，文案全量替换为实务工程语言

public/assets/addons/official/css/modern_nhc.css

@@ -378,25 +378,25 @@ img {
 /* 轮播图幻灯片不同主题背景与中式意境光影 (浅色高雅、通透水墨微晕) */
 .nhc-slide-theme-1 {
   background: 
-    linear-gradient(90deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.90) 42%, rgba(255, 255, 255, 0.15) 100%),
+    linear-gradient(90deg, rgba(255, 255, 255, 0.98) 0%, rgba(255, 255, 255, 0.92) 50%, rgba(255, 255, 255, 0.15) 100%),
     url('../images/banners/banner_lead.jpg') right center / cover no-repeat;
 }
 
 .nhc-slide-theme-2 {
   background: 
-    linear-gradient(90deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.90) 42%, rgba(255, 255, 255, 0.15) 100%),
+    linear-gradient(90deg, rgba(255, 255, 255, 0.98) 0%, rgba(255, 255, 255, 0.92) 50%, rgba(255, 255, 255, 0.15) 100%),
     url('../images/banners/banner_craft.jpg') right center / cover no-repeat;
 }
 
 .nhc-slide-theme-3 {
   background: 
-    linear-gradient(90deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.90) 42%, rgba(255, 255, 255, 0.15) 100%),
+    linear-gradient(90deg, rgba(255, 255, 255, 0.98) 0%, rgba(255, 255, 255, 0.92) 50%, rgba(255, 255, 255, 0.15) 100%),
     url('../images/banners/banner_agent.jpg') right center / cover no-repeat;
 }
 
 .nhc-slide-theme-4 {
   background: 
-    linear-gradient(90deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.90) 42%, rgba(255, 255, 255, 0.15) 100%),
+    linear-gradient(90deg, rgba(255, 255, 255, 0.98) 0%, rgba(255, 255, 255, 0.92) 50%, rgba(255, 255, 255, 0.15) 100%),
     url('../images/banners/banner_matrix.jpg') right center / cover no-repeat;
 }
 
@@ -552,9 +552,10 @@ img {
 }
 
 .nhc-hero-content {
-  text-align: center;
-  max-width: 960px;
-  margin: 0 auto;
+  text-align: left;
+  max-width: 720px;
+  margin: 0;
+  padding: 40px 0 20px;
   position: relative;
   z-index: 2;
 }
@@ -562,29 +563,29 @@ img {
 .nhc-hero-badge {
   display: inline-flex;
   align-items: center;
-  gap: 10px;
-  background: #FFFFFF;
+  gap: 8px;
+  background: rgba(255, 255, 255, 0.95);
   border: 1px solid var(--border-color);
-  padding: 6px 16px;
+  padding: 4px 12px;
   border-radius: var(--radius-sm);
-  margin-bottom: 24px;
+  margin-bottom: 20px;
   box-shadow: var(--shadow-subtle);
 }
 
 .nhc-hero-badge-text {
-  font-size: 13px;
+  font-size: 12px;
   color: var(--text-secondary);
   font-weight: 500;
 }
 
 .nhc-hero-title {
   font-family: var(--font-serif);
-  font-size: 52px;
+  font-size: 42px;
   font-weight: 700;
   color: var(--text-primary);
-  line-height: 1.25;
-  letter-spacing: 2px;
-  margin-bottom: 24px;
+  line-height: 1.32;
+  letter-spacing: -0.5px;
+  margin-bottom: 20px;
 }
 
 .nhc-hero-title span.highlight {
@@ -594,37 +595,63 @@ img {
 }
 
 .nhc-hero-subtitle {
-  font-size: 18px;
+  font-size: 15px;
   color: var(--text-secondary);
-  line-height: 1.8;
-  max-width: 780px;
-  margin: 0 auto 36px;
+  line-height: 1.75;
+  max-width: 660px;
+  margin: 0 0 32px;
 }
 
 .nhc-hero-cta {
   display: flex;
   align-items: center;
-  justify-content: center;
+  justify-content: flex-start;
   gap: 16px;
-  margin-bottom: 64px;
+  margin-bottom: 40px;
 }
 
 .nhc-hero-metrics {
   display: grid;
   grid-template-columns: repeat(4, 1fr);
-  gap: 24px;
-  background: #FFFFFF;
+  gap: 16px;
+  background: rgba(255, 255, 255, 0.92);
+  backdrop-filter: blur(12px);
+  -webkit-backdrop-filter: blur(12px);
   border: 1px solid var(--border-color);
-  border-radius: var(--radius-md);
-  padding: 28px 24px;
+  border-radius: var(--radius-sm);
+  padding: 18px 20px;
   box-shadow: var(--shadow-subtle);
+  max-width: 680px;
+  margin: 0;
 }
 
 .nhc-metric-item {
-  text-align: center;
+  text-align: left;
   position: relative;
 }
 
+.nhc-metric-val {
+  font-family: var(--font-serif);
+  font-size: 24px;
+  font-weight: 700;
+  color: var(--primary);
+  line-height: 1.2;
+}
+
+.nhc-metric-val sub {
+  font-size: 13px;
+  font-weight: 600;
+  margin-left: 2px;
+  bottom: 0;
+}
+
+.nhc-metric-label {
+  font-size: 11px;
+  color: var(--text-muted);
+  margin-top: 4px;
+  line-height: 1.4;
+}
+
 .nhc-metric-item:not(:last-child)::after {
   content: "";
   position: absolute;
@@ -1534,11 +1561,11 @@ img {
   position: relative;
   padding: 130px 0 70px;
   background: 
-    radial-gradient(circle at 50% 15%, rgba(37, 99, 235, 0.07) 0%, transparent 55%),
-    radial-gradient(circle at 85% 60%, rgba(6, 182, 212, 0.05) 0%, transparent 45%),
+    radial-gradient(circle at 15% 35%, rgba(37, 99, 235, 0.05) 0%, transparent 50%),
+    radial-gradient(circle at 85% 60%, rgba(6, 182, 212, 0.04) 0%, transparent 45%),
     linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
   border-bottom: 1px solid var(--border-color);
-  text-align: center;
+  text-align: left;
 }
 
 .nhc-breadcrumb {
@@ -1561,19 +1588,22 @@ img {
 
 .nhc-page-title {
   font-family: var(--font-serif);
-  font-size: 44px;
+  font-size: 38px;
   font-weight: 700;
   color: var(--text-primary);
-  letter-spacing: 1.5px;
+  letter-spacing: -0.5px;
+  line-height: 1.35;
   margin-bottom: 18px;
+  text-align: left;
 }
 
 .nhc-page-desc {
   max-width: 760px;
-  margin: 0 auto 30px;
-  font-size: 17px;
+  margin: 0 0 28px;
+  font-size: 16px;
   color: var(--text-secondary);
   line-height: 1.8;
+  text-align: left;
 }
 
 /* 服务三大领域深度卡片 (交替错落或大横幅) */